[INFO] fetching crate prometheus-linux-nfsdv4-exporter 1.1.3...
[INFO] checking prometheus-linux-nfsdv4-exporter-1.1.3 against master#f8f6997469237299c1d60814c7b9828602a1f8e4 for pr-143808
[INFO] extracting crate prometheus-linux-nfsdv4-exporter 1.1.3 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate prometheus-linux-nfsdv4-exporter 1.1.3
[INFO] finished tweaking crates.io crate prometheus-linux-nfsdv4-exporter 1.1.3
[INFO] tweaked toml for crates.io crate prometheus-linux-nfsdv4-exporter 1.1.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate prometheus-linux-nfsdv4-exporter 1.1.3 on toolchain f8f6997469237299c1d60814c7b9828602a1f8e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate prometheus-linux-nfsdv4-exporter 1.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded procfs v0.7.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c2c1bdf099a084ac99afc9368ad0de0b382149b49282b92ff3dfc3b4a275555
[INFO] running `Command { std: "docker" "start" "-a" "2c2c1bdf099a084ac99afc9368ad0de0b382149b49282b92ff3dfc3b4a275555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c2c1bdf099a084ac99afc9368ad0de0b382149b49282b92ff3dfc3b4a275555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c2c1bdf099a084ac99afc9368ad0de0b382149b49282b92ff3dfc3b4a275555", kill_on_drop: false }`
[INFO] [stdout] 2c2c1bdf099a084ac99afc9368ad0de0b382149b49282b92ff3dfc3b4a275555
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f006942eab080fd98acb9b410027133be572b6c7358fa767484b4ed973aff1c0
[INFO] running `Command { std: "docker" "start" "-a" "f006942eab080fd98acb9b410027133be572b6c7358fa767484b4ed973aff1c0", kill_on_drop: false }`
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[INFO] [stderr]     Checking prometheus-linux-nfsdv4-exporter v1.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `clientid` is never read
[INFO] [stdout]   --> src/nfs/nfsv4.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Nfsv4Client {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 36 |     pub clientid: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Nfsv4Client` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `clientid` is never read
[INFO] [stdout]   --> src/nfs/nfsv4.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Nfsv4Client {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 36 |     pub clientid: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Nfsv4Client` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_type_of` is never used
[INFO] [stdout]   --> src/utils/helper.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn print_type_of<T>(_: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     match matches.subcommand() {
[INFO] [stdout] 82 | |         ("set", Some(m)) => start_prometheus(m),
[INFO] [stdout] 83 | |         _ => Ok(help()),
[INFO] [stdout] 84 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let _ = match matches.subcommand() {
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_type_of` is never used
[INFO] [stdout]   --> src/utils/helper.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn print_type_of<T>(_: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     match matches.subcommand() {
[INFO] [stdout] 82 | |         ("set", Some(m)) => start_prometheus(m),
[INFO] [stdout] 83 | |         _ => Ok(help()),
[INFO] [stdout] 84 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let _ = match matches.subcommand() {
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 38.12s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: buf_redux v0.8.4, multipart v0.17.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "f006942eab080fd98acb9b410027133be572b6c7358fa767484b4ed973aff1c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f006942eab080fd98acb9b410027133be572b6c7358fa767484b4ed973aff1c0", kill_on_drop: false }`
[INFO] [stdout] f006942eab080fd98acb9b410027133be572b6c7358fa767484b4ed973aff1c0